CVE-2018-19202: Mybb

Medium severity, CVSS 6.1. EPSS: 0.8% chance of exploitation in the next 30 days.

A reflected XSS vulnerability in index.php in MyBB 1.8.x through 1.8.19 allows remote attackers to inject JavaScript via the 'upsetting[bburl]' parameter.

Affected products

• Mybb Mybb: from 1.8.0, before 1.8.20 (fixed in 1.8.20)

Published 2019-04-11. Last modified 2026-06-17.